Browsing by Author "Eleftheriades, G. V."
Now showing items 1-20 of 37
-
Book Chapter
Antenna Applications of Negative Refractive Index Transmission-Line (NRI-TL) Metamaterials
Eleftheriades, G. V.; Antoniades, Marcos A. (wiley, 2007)One-dimensional (1D) and to a lesser extent two-dimensional negative refractive index transmission-line (NRI-TL) metamaterials and corresponding antenna applications have been presented. An expression for the total phase ...
-
Conference Object
Antenna applications of negative-refractive-index transmission-line metamaterials
Antoniades, Marcos A.; Qureshi, F.; Eleftheriades, G. V. (2006)
-
Article
Antenna applications of negative-refractive-index transmission-line structures
Eleftheriades, G. V.; Antoniades, Marcos A.; Qureshi, F. (2007)A number of new antenna-related applications that have recently been developed at the University of Toronto based on the concept of negative-refractive-index transmission-line metamaterials are reviewed. These include ...
-
Conference Object
Applications of negative-refractive-index transmission-line (NRI-TL) metamaterials in planar antennas and their feed networks
Antoniades, Marcos A.; Eleftheriades, G. V. (2007)Negative-refractive-index transmission-line (NRI-TL) metamaterials and introduced and their fundamental properties are described. Following this, various applications using NRI-TLs are shown and their salient characteristics ...
-
Conference Object
A broadband 1:4 Series power divider using metamaterial phase-shifting lines
Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A metamaterial 1:4 series power divider that provides equal power split to all four output ports over a large bandwidth Is presented. The divider comprises four non-radiating metamaterial lines In series that can each Incur ...
-
Conference Object
A broadband balun using metamaterial phase-shifting lines
Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A 3-port device that converts a single-ended input to a differential output over a large bandwidth is presented. The balun comprises a Wilkinson divider, followed by a +90° negative-refractive-index (NRI) metamaterial (MM) ...
-
Article
A broadband dual-mode monopole antenna using NRI-TL metamaterial loading
Antoniades, Marcos A.; Eleftheriades, G. V. (2009)A printed monopole antenna is proposed which uses negative-refractive-index transmission-line (NRI-TL) metamaterial loading in order to achieve a broadband dual-mode operation. The metamaterial-loaded monopole supports a ...
-
Article
A broadband series power divider using zero-degree metamaterial phase-shifting lines
Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A metamaterial 1:4 series power divider that provides equal power split to all four output ports over a large bandwidth is presented, which can be extended to an arbitrary number of output ports. The divider comprises four ...
-
Article
A broadband Wilkinson balun using microstrip metamaterial lines
Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A metamaterial balun that converts a single-ended input to a differential output over a large bandwidth is presented. The device also exhibits excellent return loss, isolation, and through characteristics over the same ...
-
Conference Object
A compact and broadband NRI-TL metamaterial
Antoniades, Marcos A.; Eleftheriades, G. V. (2009)A compact and broadband negative-refractive-index transmission-line (NRI-TL) metamaterial antenna is proposed,which consists of a conventional printed monopole loaded in a left-handed fashion. The metamaterial loading ...
-
Article
A compact and low-profile metamaterial ring antenna with vertical polarization
Qureshi, F.; Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A compact (λ 0/11 footprint) and low-profile (λ 0/28 height) metamaterial ring antenna is proposed using two metamaterial unit cells. Each constituent unit cell consists of negative-refractive-index (NRI) microstrip ...
-
Article
Compact linear lead/lag metamaterial phase shifters for broadband applications
Antoniades, Marcos A.; Eleftheriades, G. V. (2003)A compact one-dimensional phase shifter is proposed using alternating sections of negative refractive index (NRI) metamaterials and printed transmission lines (TL). The NRI metamaterial sections consist of lumped element ...
-
Conference Object
A compact low-profile high-impedance surface for use as an antenna ground plane
Raza, S.; Antoniades, Marcos A.; Eleftheriades, G. V. (2011)A compact and low-profile high-impedance surface is proposed which offers a significantly smaller footprint without affecting the usable reflection phase bandwidth of the structure. The unit cell of the proposed surface ...
-
Conference Object
A compact monopole antenna with a defected ground plane for multi-band applications
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)
-
Article
A compact multiband monopole antenna with a defected ground plane
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)A compact multiband antenna is proposed that consists of a printed circular disc monopole antenna with an L-shaped slot cut out of the ground, forming a defected ground plane. Analysis of the current distribution on the ...
-
Article
A compact tri-band monopole antenna with single-cell metamaterial loading
Zhu, J.; Antoniades, Marcos A.; Eleftheriades, G. V. (2010)A compact tri-band planar monopole antenna is proposed that employs reactive loading and a defected ground-plane structure. The reactive loading of the monopole is inspired by transmission-line based metamaterials (TL-MTM), ...
-
Conference Object
Compact, linear, lead/lag phase shifters using negative refractive index metamaterials
Antoniades, Marcos A.; Eleftheriades, G. V. (2003)A new type of phase shifter using cascaded sections of NRI metamaterials and PRI transmission lines is proposed, which offers some significant advantages over conventional delay lines. The phase shifter is compact in size, ...
-
Conference Object
Compact, wideband and multiband antennas based on metamaterial concepts
Antoniades, Marcos A.; Zhu, J.; Selvanayagam, M.; Eleftheriades, G. V. (2010)In this review article, various antenna designs that are based on metamaterial concepts are presented which have been developed at the University of Toronto. Specifically, several antennas that are based on the zero-index ...
-
Article
A CPS leaky-wave antenna with reduced beam squinting using NRI-TL metamaterials
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)A reduced beam-squinting printed leaky-wave antenna (LWA) is proposed, comprising cascaded negative-refractive-index transmission-line (NRI-TL) metamaterial unit cells. Each NRI-TL unit cell is implemented in co-planar ...
-
Conference Object
Enabling electromagnetic applications of negative-refractive-index transmission-line metamaterials part II
Eleftheriades, G. V.; Antoniades, Marcos A.; Islam, R. (Institute of Electrical and Electronics Engineers Inc., 2004)The 1-Dimensional (1-D) metamaterial phase-shifting lines presented in [1] can be used to develop compact and broadband, non-radiating, metamaterial feed-networks for antenna arrays. These can be used to replace conventional ...